JPH0717480Y2 - Work transfer device for fully automatic screen printer - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is mainly applied to a work such as a printed circuit board when applying a resist or the like to a printed circuit board for printing.
In a fully automatic screen printing machine that automatically performs a series of operations such as aligning alignment corresponding to the application printing position, application printing, discharge, etc., reliably send the aligned work to the printing device without causing positional displacement. The present invention relates to a work transfer device for a fully automatic screen printing machine.

(Prior Art) Conventionally, a full-automatic screen printing machine provided with an alignment table for positioning a thrown workpiece in correspondence with a predetermined coating printing position when coating a resist on a printed circuit board (work). ing. The alignment is
After being set on the alignment table, the alignment mark on the work is read by, for example, a camera, and the alignment table is tilted with respect to the X direction, which is the direction in which the work is conveyed, the Y direction that is substantially orthogonal to the direction, and the conveyance direction. The movement adjustment in each direction of the θ angle corrects the relative positional deviation from the normal position. After alignment, the work table fixed to the vacuum is carried to the printing device by the carrying table.

(Problems to be solved by the invention) In such a conventional full-automatic screen printing machine, fixing of the work when the aligned work is conveyed to the printing apparatus position by the conveyance table is described in, for example, JP-B-61-32144. As disclosed in the publication, an air suction type vacuum structure fixed support means is used.

However, in the case of a printed circuit board (industrial substrate), since many through holes are opened in the work, fixing by vacuum becomes insufficient, and there is a case where a position shift occurs during transportation. As described above, if the work is not fixedly positioned on the transport table, the alignment work already performed by reading the work alignment mark becomes completely meaningless and does not match the screen printing plate position. This causes print misalignment. That is, position the input work on the alignment table,
Even if this is fixedly supported by vacuum, on the transport table that travels forward and backward, there will be a slight positional deviation due to inertial action at the time of starting traveling at the alignment position, stopping at the printing position, etc. It is a thing. Even with such a slight positional deviation, in a printed circuit board or the like that requires high precision, the circuit pattern drawn may not be reproduced accurately.

Therefore, this invention has been devised in consideration of the existing circumstances as described above, and when automatically performing a series of operations such as inputting of workpieces, alignment, coating and printing of resist, etc. The provision of a work transfer device for a full-automatic screen printing machine that allows a work after alignment to be accurately transferred to a predetermined position in the printing device when the work is transferred into the printing device without causing positional displacement during transfer. To aim.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the work transfer device of the fully automatic screen printing machine according to the present invention prints the input work W by the alignment device 3 on the alignment stage 4. It is provided in a fully automatic screen printing machine which is aligned with the position and then sent to the printing device 5 by the carrying device 10 and carried out to the discharging device 8 after the printing on the printing stage 6 is completed.

Then, the raising / lowering means 21 for raising and lowering the work W, which is aligned and positioned, onto the alignment stage 4 on the carry-in table 20 which moves forward and backward between the aligning device 3 and the printing device 5, and places and lowers it on the printing stage 6, The suction means 26 for adsorbing W and the clamp means 31 for sandwiching the work W from the front and rear in the transport direction are provided.
A slide base plate 34 and a clamp base plate 39, which are slid and guided along the conveyance direction of the work W, are provided front and back on the side surface of the linear base plate 32 vertically provided on the back surface of the main body. A lock cylinder 37 that advances and retracts a lock rack 36 that meshes with a base rack 35 arranged on the side surface.
And a slide cylinder 38 for advancing and retracting the clamp base plate 39, and the clamp base plate 39 is
A clamp cylinder 41 that causes a hook-shaped clamp plate 43 that slides along the up-down direction to project from and retract to the upper surface of the carry-in table 20 main body through a clamp long hole 44 that is long opened in the carry-in table 20 main body along the carrying direction. It is characterized by having attached.

(Operation) In the fully automatic screen printing machine in which the work transfer device according to the present invention is incorporated, when the work W is loaded into the aligning device 3 by the loading device 1, the aligning stage 4 and the aligning stage divided into right and left are configured. 4 It is stopped at a predetermined position on the carry-in table 20 located in the mutual gap.
When stopped, a relative positional deviation from the regular position in the printing device 5 is detected, and in order to match it, the X direction along the loading direction into the printing device 5, the Y direction substantially orthogonal to the loading direction, And the alignment stage 4 is moved and adjusted in each direction of θ which is a predetermined inclination angle with respect to the carry-in direction.
Is accurately positioned in correspondence with a predetermined printing position.

After the alignment is completed, the work W is sucked onto the upper surface of the carry-in table 20 by the operation of the suction means 26. At the same time, the clamp plate 43 that projects on the carry-in table 20 by the operation of the clamp cylinder 41 in the clamp means 31 sandwiches the work W before and after in the transport direction, and firmly supports and fixes the work W. Further, the operation of the elevating cylinder 23 in the elevating means 21 raises the main body of the carry-in table 20 and raises the work W on the alignment stage 72.

At this time, the clamp position for the work W is the slide base plate provided on the back surface of the main body of the carry-in table 20.
Corresponding by slide adjustment of 34 and clamp base plate 39. In addition, a lock rack 36 that meshes with the operation of the lock cylinder 37 is attached to the base rack 35 arranged on the side surface of the linear base plate 32.
Secures itself and does not cause blurring or other problems during transportation.

When the fixing of the work W on the carry-in table 20 is completed, the carry-in table 20 is separated from the left and right alignment stages 4, travels forward to the printing position of the printing device 5 to carry in the work W, and after being stopped, the screen printing is performed. Done.

At this time, the carry-in table 20 is positioned in a gap between the left and right divided printing stages 6 in the printing device 5 and stopped, and supports the work W in a suction state together with the printing stage 6.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

<Outline of Full-Automatic Screen Printing Machine> As shown in FIGS. 6 and 7, a full-automatic screen printing machine in which the present invention work transfer device is incorporated is designed to apply a work W, which is a printed circuit board, for which coating printing is planned. The matching device 3 is charged by the charging device 1, the preliminary matching device 2 incorporated in the matching device 3 performs preliminary matching, and then the matching device 3 itself performs main matching. When this alignment is completed, the work W after alignment is sent to the printing device 5 by the transport device 10 of the present invention, and at the same time, the work W after printing by the squeegee unit 7 is carried out from the printing device 5 to the ejection device 8. Each of these devices 1, 2, 3, 10, 5, 8 is sequentially arranged along the conveyance direction of the work W.

In addition, the alignment stage 4 and the printing device 5 in the alignment device 3
Each of the printing stages 6 in the load is divided into left and right parts along the conveyance direction of the work W. Then, the carry-in table 20 and the carry-out table 50 of the carrying device 10 synchronously advance and retreat within the central gaps of the left and right parts thereof, and the carry-in table 20 is carried out between the aligning device 3 and the printing device 5. The table 50 reciprocates between the printing device 5 and the ejection device 8 while moving up and down in association with the advance / retreat.

<Outline of Work Transfer Device> As described above, the work transfer device according to the present invention carries in the work W from the aligning device 3 to the printing device 5 by the carry-in table 20, and further, the carry-in table 20. The unloading table 50 that moves in and out in synchronism with the above can also carry out the work W from the printing device 5 to the unloading device 8.

That is, as shown in FIGS. 1, 6, and 7, the aligning frame 3A of the aligning device 3, the print frame 5A of the printing device,
Also, a pair of guide rails 11 are laid across the discharge frame 8A of the discharge device 8 along the left and right in the transport direction of the work W. Then, the carry-in table 20 is placed on the guide rail 11 by the traveling guide 12 fixed to the lower surface, and the carry-out table 50 is placed on the guide rail 11 by the traveling guide 51 also fixed to the lower surface. Further, the carry-in table 20 and the carry-out table 50 are joined together by a joint means 60 that expands and contracts, and the carry-out table 50 is connected in front of the carry-in table 20.

Further, for example, a conveyance motor installed and fixed to the printing frame 5A
Transport table 14 circulated by driving 13
20 is fixed so that the carry-in table 20 itself travels back and forth, and when the carry-in table 20 retreats toward the aligning device 3 side along with the operation of the joint means 60 following the reciprocal travel of the carry-in table 20, carry-out is carried out. The gap with the table 50 is widened, and the gap with the carry-out table 50 is narrowed when the carry-in table 20 advances toward the printing device 5 side.

<Loading Table> Further, the loading table 20 itself is in a floating state protruding above the alignment stage 4 and the printing stage 6 when moving forward, and is substantially flush with the printing stage 6 when printing at the position of the printing stage 6, and moves backward. Sometimes the printing stage 6,
The alignment stage 4 is formed in a depressed shape below, and elevating means 21 for that purpose is provided. Further, the carry-in table 20 is provided with a suction means 26 and a clamp means 31 for fixing the work W to be carried in so as to prevent the positional deviation during the carry-in.

<Elevating means of the carry-in table> As shown in FIGS. 2 and 3, the elevating means 21 is a cylinder base plate that straddles the main body of the carry-in table 20 located on the upper surface over the guide rail 11. By operating the lift cylinder 23 fixed to 22, the lift guide 24 is used to guide the lift.

The elevating cylinder 23 has a tandem structure arranged in front of and behind the main body of the carry-in table 20, and is controlled so that the elevating interval is in two stages. On the other hand, it is, for example, 20 mm or 5 mm.

The interval of raising and lowering of the main body of the carry-in table 20 is based on the combination of the detection states of the sensor plate 45 attached to the back surface and the ON-OFF states of the two sensors 46 arranged vertically, and only the upper sensor 46 is ON. If only the lower sensor 46 of 20 mm and 20 mm is ON, it is set to the state of 5 mm for each ascending position, and if both sensors are ON, it is set to the state of descending position (see FIG. 5).

<Suction means of the carry-in table> The suction means 26 of the carry-in table 20 is the second
As shown in the figure, a suction pipe 28 connected to a vacuum pump (not shown) or the like is connected to a large number of suction holes 27 formed in the upper surface of the carry-in table 20 along the left-right direction of the carrying table. is there.

<Clamping Means of Carry-In Table> Further, the clamp means 31 fixes the work W on the carry-in table 20 at the aligning position after the alignment is completed by sandwiching the work W from the front and rear in the carry-in direction, and is configured symmetrically in the front-rear direction. ing.

Therefore, as shown in FIG. 2 to FIG. 5, the linear table 33 is slid on the side surface of the linear base plate 32 vertically provided on the back surface of the main body of the carry-in table 20 along the carrying direction by the linear guide 33 arranged on the side surface of the linear base plate 32. Guided slide base plate 34 and clamp base plate
39 and the front and rear are installed.

The slide base plate 34 has a linear base plate.
A lock cylinder 37 for advancing and retreating a lock rack 36 that engages with a long base rack 35 arranged on the side surface of 32 is attached, and by the operation of the lock cylinder 37, the slide base plate 34 itself is capable of advancing and retracting or maintaining positioning stop.

Then, by operating the slide cylinder 38 attached to the slide base plate 34, the clamp base plate 39
Is to move back and forth.

Further, the clamp base plate 39 is provided with a hook-shaped clamp plate 43 which is moved up and down through an up-and-down slide guide 42 by the operation of a clamp cylinder 41 attached to the clamp base plate 39 along the carrying direction of the carry-in table 20. It is adapted to be projected and retracted with respect to the upper surface of the main body of the carry-in table 20 through the elongated clamp hole 44 which is opened long.

Therefore, the clamp plate 43 itself is sunk in the lower surface of the main body of the carry-in table 20 when the carry-in table 20 is positioned on the aligning device 3 side and the aligning operation is being performed, and after the alignment is completed, the clamp cylinder 41 is operated. It projects through the clamp elongated hole 44 on the upper surface of the carry-in table 20 main body, and then,
The slide cylinder 38 operates to slide the work, and the clamp cylinder 41 operates to press and fix the work W on the upper surface of the table body 20. Next, the printing device 5
After the paper is conveyed to, the work W is opened in reverse, and after the work W is opened, the work W is retracted into the lower surface of the main body of the carry-in table 20 so as not to hinder the printing operation of the printing device 5.

<Cushion of the carry-in table> A magnet plate 47 is attached to the front and rear ends of the carry-in table 20 to attach magnets 48 to the magnets 48 arranged at the carrying start position end of the aligning device 3 and the carrying end position end of the printing device 5. As a result, the stopped state is maintained at the start and end of the conveyance, and a damper 49 is attached to absorb the shock at the end of the forward / backward traveling (FIGS. 1 and 2). reference).

<Unloading Table of Conveying Device> On the other hand, the unwinding table 50 itself projects upward of the printing stage 6 to lift the work W on the printing stage 6 when the printing table 6 is moved forward, and at the time of discharging at the discharging device 8 position and printing. At the time of retreating to the device 5 side, the discharge device 8 has a depression surface below the discharge surface, and elevating means 52 for that purpose is provided (see FIG. 1).

<Joint Means> The joint means 60 is configured to expand and contract the interval with the carry-in table 20 by the operation of the joint cylinder 61 fixed to the carry-out table 50 itself.

That is, when the carry-out table 50 also travels following the reciprocating movement of the carry-in table 20, the carry-out table 50 has a larger interval with respect to the carry-in table 20 when retracting toward the aligning device 3 side, and advances toward the printing device side 5. In this case, the space becomes narrower, and the installation space between the printing device 5 and the discharging device 8 can be set compactly (see FIGS. 1 and 6).

<Work Lift Mechanism> Further, in order to smooth the retreat and retreat of the carry-in table 20 and the carry-out table 50 of the carrying device 10 from below the work W placed on the printing stage 6 of the printing device 5, respectively. As shown in FIG. 6, a work lift mechanism 70 that lifts the work W placed on the print stage 6 after printing is incorporated in the print stage 6 portion of the printing apparatus 5.

The work lift mechanism 70 operates after the printing operation of the printing device 5 is finished and immediately before the carry-in table 20 and the carry-out table 50 of the carrying device 10 travel backward.
Lift the rear side in the transport direction of. As a result, below the work W, the carry-in table in the carrier device 10
20 retreats and retracts to the aligning device 3 side with the work W left, and similarly, the carry-out table 50 retreats and enters below to carry out the work W, which is smoothly performed.

<Example of Operation> Next, an example of the operation of the work transfer device of the present invention will be described.

Work W introduced into the aligning device 3 by the introducing device 1.
Is stopped and placed on the aligning stage 4 by the preliminary aligning device 2, and when the set is stopped, the aligning device 3 is operated to adjust the movement in each of the X, Y, and θ directions, and the work W is placed at a predetermined printing position. Position accurately.

When the alignment and fixing are completed, the carrying device 10 is operated, and the carry-in table 20 travels forward to the printing position of the printing device 5 to carry in the work W. After being stopped, the screen printing is performed.

At this time, in the carry-in table 20, the work W is adsorbed on the upper surface of the carry-in table 20 by the operation of the suction means 26, and at the same time, the clamp plate 43, which is operated to project onto the carry-in table 20 by the operation of the clamp means 31, is moved in the front and rear direction of the carrying direction. The work W is sandwiched and the work W is firmly supported and fixed. After fixing, the lifting table 21 is operated to bring in the loading table.
The main body 20 moves up and lifts the work W onto the alignment stage 72. In the lifted state, the work W travels forward to the printing device 5 side and brings the work W onto the printing stage 6.

Then, the main body of the carry-in table 20 is lowered to support the work W in a suction state together with the printing stage 6 having the same level surface, and the squeegee unit 7 performs screen printing on the work W.

When printing is completed, the work W lifted up in an inclined shape by the work lift mechanism 70 on the printing stage 6.
Are carried out to the discharge device 8 by the carry-out table 50.

(Effect of the Invention) The work transfer device of the present invention is configured as described above. Therefore, the fully automatic screen printing machine can perform a series of operations such as inputting of work W, alignment, coating and printing of resist, etc. When the work is automatically performed, for example, the work W, which has been subjected to the application printing of resist or the like in the production of a printed circuit board or the like in the alignment process prior to printing, can be sent to the printing device 5 without causing positional displacement. ,
Printing can be performed accurately.

That is, since the carry-in table 20 for carrying the aligned work W into the printing device 5 includes not only the suction means 26 for sucking the work W but also the clamp means 31 for sandwiching the work W before and after the carrying direction, The aligned work W corresponding to the position can be loaded into the printing device 5 while maintaining the accurate alignment position. Therefore, for example, there is no room for positional displacement due to inertial action that occurs during transportation, and the alignment position and the printing position do not shift.
It ensures accurate coating and printing on the work W.

Further, since the carry-in table 20 is configured to be moved forward and backward within the mutual gap between the aligning device 3 and the printing device 5, which are divided into the left and right alignment stages 4 and 6, respectively. When the paper is carried into the printing apparatus 5 and further carried out from the printing apparatus 5, the work W is supported at a substantially central position, so that not only the carrying operation thereof is stabilized, but also the whole carrying apparatus 10 is made compact, and , It is also very useful for downsizing the fully automatic screen printing machine itself.

Further, the clamp means 31 can cope with the size of the work W by adjusting the slide between the slide base plate 34 and the clamp base plate 39 arranged in the front and rear along the conveyance direction of the work W. In addition, the slide base plate 34 is operated by the operation of the lock cylinder 37 that advances and retracts the lock rack 36 that engages with the base rack 35 provided on the side surface of the linear base plate 32 that is vertically provided on the back surface of the loading table 20 main body.
It is possible to firmly fix itself, and reliably prevent the work W from being shaken during transportation.

The clamp plate 39 of the clamp means 31 is provided on the clamp base plate 39 which is moved forward and backward by the operation of the slide cylinder 38 attached to the side surface of the linear base plate 32,
Since it slides along the clamp long hole 44 of the main body of the carry-in table 20, the work W is reliably pinched from the front and rear in the carrying direction. Not only that, the clamp plate 39 itself has a hook shape and is moved up and down in the clamp elongated hole 44 by the operation of the clamp cylinder 41 attached to the clamp base plate 39, so that the clamp plate 39 appears and disappears with respect to the upper surface of the carry-in table 20 main body.
The work W on the main body of the carry-in table 20 can be firmly pressed against the upper surface of the carry-in table 20.

As described above, according to the present invention, it is possible to reliably carry a work into a predetermined position in the printing apparatus without causing the work to be misaligned during conveyance, and to print a resist or the like at an accurate position. It has an excellent effect such as being performed.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a front view of a carrying device, FIG. 2 is a partially cutaway plan view of the carry-in table, FIG. 3 is a front sectional view of the same, and FIG. Side sectional view, FIG. 5 is a sectional view of the sensor portion in the lifting means,
FIG. 6 is a partially cutaway plan view of a fully automatic screen printing machine incorporating the device of the present invention, and FIG. 7 is a front view of the same. W ... Work, 1 ... Injection device, 2 ... Preliminary alignment device,
3 ... Aligning device, 3A ... Aligning frame, 4 ... Aligning stage, 5 ... Printing device, 5A ... Printing frame, 6 ... Printing stage, 7 ... Squeegee unit, 8 ... Ejecting device, 8A ... … Ejection frame, 10… Transport device, 11… Guide rail, 12… Travel guide, 13… Transport motor, 14…
… Conveyor belt, 20… Carry-in table, 21… Lifting means,
22 …… Cylind base plate, 23 …… Lift cylinder,
24 …… Lifting guide, 26 …… Suction means, 27 …… Suction port, 28
…… Suction pipe, 31 …… Clamping means, 32 …… Linear base plate, 33 …… Linear guide, 34 …… Slide base plate, 35 …… Base rack, 36 …… Lock rack, 37 …… Lock cylinder, 38 …… Slide cylinder,
39 …… Clamp base plate, 41 …… Clamp cylinder, 42 …… Vertical slide guide, 43 …… Clamp plate, 44 …… Clamp slot, 45 …… Sensor plate, 46
…… Sensor, 47 …… Magnet plate, 48 …… Magnet, 49 …… Damper, 50 …… Export table, 51 ……
Travel guide, 52 ...... Lifting means, 60 ...... Joint means,
61 …… Joint cylinder, 70 …… Work lift mechanism.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsumi Ishii 1357 Tanoue, Shima, Hachiman-cho, Gujo-gun, Gifu No. 3 Tokai Seiki Co., Ltd. (72) Mitsuyoshi Washimi Tanoue, Shima, Hachiman-cho, Gujo-gun, Gifu Prefecture No. 1357 No. 3 Tokai Seiki Co., Ltd. (56) Reference JP 57-109655 (JP, A) JP 1-118438 (JP, A) JP 2-103146 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A fully automatic system for aligning an input work by a aligning device in correspondence with a printing position on a aligning stage, then feeding the work into a printing device, and carrying out to a discharge device after printing on the print stage. A work transfer device for a screen printing machine, which is an elevating means for lifting a work, which is aligned and positioned, above a registration stage on a carry-in table that travels back and forth between both the alignment device and the printing device, and places and lowers the work on the printing stage. It is equipped with suction means for sucking the work, and clamping means for sandwiching the work from the front and rear in the transport direction. The clamp means slides along the work transport direction on the side surface of the linear base plate that is hung vertically on the back surface of the loading table body. Install the slide base plate and clamp base plate in front and The plate is equipped with a lock cylinder that advances and retracts a lock rack that engages with a base rack that is arranged on the side of the linear base plate, and a slide cylinder that advances and retracts the clamp base plate.The clamp base plate has a hook that slides in the vertical direction. Of a fully automatic screen printing machine characterized in that a clamp cylinder is attached to the upper surface of the carry-in table body through a clamp long hole that is long opened in the carry-in table body along the carrying direction. Work transfer device.